Anodized alumina membranes prepared with average pore diameters ranging from 45 nm to 150 nm were investigated. Transmission electron microscopy (TEM) was used to further investigate the size differences between SiNW samples grown within the membrane and grown out of the membrane surface. Vapor-liquid-solid (VLS) growth conditions required to synthesize silicon nanostructures (SiNW) in the membranes were investigated. High-density arrays of SiNWs were obtained with diameter distributions that closely matched the pore size distribution of the membranes. The results show that the increase in SiNW diameter upon growth out of the end of the pores is due to a change in the shape of the Au tip from cylindrical to hemispherical.
All Science Journal Classification (ASJC) codes
- Materials Science(all)
- Mechanics of Materials
- Mechanical Engineering